Selena Gomez stopped by "Late Show with David Letterman" Monday to promote her new film "Spring Breakers," but she also got in a little dig on her ex, Justin Bieber.

When Letterman explained that he once made pop superstar Bieber cry, the 20-year-old cracked, "Well then, that makes two of us."

Bam!

Gomez hadn't publicly addressed the split until now. As you can see in the clip above, she doesn't seem apologetic about the joke. Since their split, Bieber has raised eyebrows with some strange behavior. Gomez, on the other hand, has been hanging with her "Spring Breakers" costars, including Vanessa Hudgens, Ashley Benson and James Franco.

The full interview airs at 10:35 p.m. CT March 18 on CBS. Comedian Bob Sarlatte and musical guest Killer Mike also appear in the episode. Read an excerpt of Letterman's conversation with Gomez below.

Letterman: "Now, I remember last time you were here, you were with a Justin Bieber?"Gomez: "I was with 'a Justin Bieber?'"Letterman: "... Yeah, you were with 'a Justin Bieber.' And is that ... that's not going on now."Gomez: "No, I'm single, yeah."Letterman: "You're fine."Gomez: "I'm so good."Letterman: "Good, yeah. I think you're fine ... Now, the last time he was on, uh, he and I got into a conversation, and I--he said something and then I said something, and then he said something and I said something, and I made him cry."Gomez: "Well then, that makes two of us."Letterman: "That's pretty good--pretty strong."Want more? Discuss this article and others on Show Patrol's Facebook page.